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dust3d/third_party/libigl/include/igl/ply.h

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#ifndef IGL_PLY_H
#define IGL_PLY_H
/*
Header for PLY polygon files.
- Greg Turk, March 1994
A PLY file contains a single polygonal _object_.
An object is composed of lists of _elements_. Typical elements are
vertices, faces, edges and materials.
Each type of element for a given object has one or more _properties_
associated with the element type. For instance, a vertex element may
have as properties three floating-point values x,y,z and three unsigned
chars for red, green and blue.
---------------------------------------------------------------
Copyright (c) 1994 The Board of Trustees of The Leland Stanford
Junior University. All rights reserved.
Permission to use, copy, modify and distribute this software and its
documentation for any purpose is hereby granted without fee, provided
that the above copyright notice and this permission notice appear in
all copies of this software and that you do not sell the software.
THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
--------------------------------------------------------------------------------
Joao Fradinho Oliveira, July 2005
Copyright (c) 2005 University College London
copyright conditions as above
update for ply reading of multi OS ply files, in any OS (Unix, Macintosh, PC)
--------------------------------------------------------------------------------
ply_open_for_reading
* was changed to always open files in binary mode, files written in ascii can also be
read with this binary mode.
* allows opening of filenames that are alias files in macintosh
* code tested on pc and mac
get_words
* was changed to handle line breaks in UNIX, MACINTOSH, PC, it resets the file pointer
accordingly for the next read.
NOTES:
The ply file, has always an ascii part for the header, and a binary or ascii
part for the data.
The header part in ascii, dictates that linebreaks are used, this make models
operating system dependent, as a line break in unix is indicated with the escape character \n,
on a macintosh, with \r, and on a pc with \r\n <--2 unsigned chars, 2 bytes, instead of 1 byte.
get_words allows reading of any OS, text editors such as BBEdit do not save the linebreaks
properly to target OSs with binary files.
*/
#ifndef __PLY_H__
#define __PLY_H__
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <string.h>
namespace igl {
namespace ply {
#define PLY_ASCII 1 /* ascii PLY file */
#define PLY_BINARY_BE 2 /* binary PLY file, big endian */
#define PLY_BINARY_LE 3 /* binary PLY file, little endian */
#define PLY_BINARY_NATIVE 4 /* binary PLY file, same endianness as
current architecture */
#define PLY_OKAY 0 /* ply routine worked okay */
#define PLY_ERROR -1 /* error in ply routine */
/* scalar data types supported by PLY format */
#define PLY_START_TYPE 0
#define PLY_CHAR 1
#define PLY_SHORT 2
#define PLY_INT 3
#define PLY_UCHAR 4
#define PLY_USHORT 5
#define PLY_UINT 6
#define PLY_FLOAT 7
#define PLY_DOUBLE 8
#define PLY_END_TYPE 9
#define PLY_SCALAR 0
#define PLY_LIST 1
typedef struct PlyProperty { /* description of a property */
const char *name; /* property name */
int external_type; /* file's data type */
int internal_type; /* program's data type */
int offset; /* offset bytes of prop in a struct */
int is_list; /* 1 = list, 0 = scalar */
int count_external; /* file's count type */
int count_internal; /* program's count type */
int count_offset; /* offset byte for list count */
} PlyProperty;
typedef struct PlyElement { /* description of an element */
const char *name; /* element name */
int num; /* number of elements in this object */
int size; /* size of element (bytes) or -1 if variable */
int nprops; /* number of properties for this element */
PlyProperty **props; /* list of properties in the file */
char *store_prop; /* flags: property wanted by user? */
int other_offset; /* offset to un-asked-for props, or -1 if none*/
int other_size; /* size of other_props structure */
} PlyElement;
typedef struct PlyOtherProp { /* describes other properties in an element */
const char *name; /* element name */
int size; /* size of other_props */
int nprops; /* number of properties in other_props */
PlyProperty **props; /* list of properties in other_props */
} PlyOtherProp;
typedef struct OtherData { /* for storing other_props for an other element */
void *other_props;
} OtherData;
typedef struct OtherElem { /* data for one "other" element */
char *elem_name; /* names of other elements */
int elem_count; /* count of instances of each element */
OtherData **other_data; /* actual property data for the elements */
PlyOtherProp *other_props; /* description of the property data */
} OtherElem;
typedef struct PlyOtherElems { /* "other" elements, not interpreted by user */
int num_elems; /* number of other elements */
OtherElem *other_list; /* list of data for other elements */
} PlyOtherElems;
typedef struct PlyFile { /* description of PLY file */
FILE *fp; /* file pointer */
int file_type; /* ascii or binary */
float version; /* version number of file */
int nelems; /* number of elements of object */
PlyElement **elems; /* list of elements */
int num_comments; /* number of comments */
char **comments; /* list of comments */
int num_obj_info; /* number of items of object information */
char **obj_info; /* list of object info items */
PlyElement *which_elem; /* which element we're currently writing */
PlyOtherElems *other_elems; /* "other" elements from a PLY file */
} PlyFile;
/* memory allocation */
extern char *my_alloc();
#define myalloc(mem_size) my_alloc((mem_size), __LINE__, __FILE__)
#ifndef ALLOCN
#define REALLOCN(PTR,TYPE,OLD_N,NEW_N) \
{ \
if ((OLD_N) == 0) \
{ ALLOCN((PTR),TYPE,(NEW_N));} \
else \
{ \
(PTR) = (TYPE *)realloc((PTR),(NEW_N)*sizeof(TYPE)); \
if (((PTR) == NULL) && ((NEW_N) != 0)) \
{ \
fprintf(stderr, "Memory reallocation failed on line %d in %s\n", \
__LINE__, __FILE__); \
fprintf(stderr, " tried to reallocate %d->%d\n", \
(OLD_N), (NEW_N)); \
exit(-1); \
} \
if ((NEW_N)>(OLD_N)) \
memset((char *)(PTR)+(OLD_N)*sizeof(TYPE), 0, \
((NEW_N)-(OLD_N))*sizeof(TYPE)); \
} \
}
#define ALLOCN(PTR,TYPE,N) \
{ (PTR) = (TYPE *) calloc(((unsigned)(N)),sizeof(TYPE));\
if ((PTR) == NULL) { \
fprintf(stderr, "Memory allocation failed on line %d in %s\n", \
__LINE__, __FILE__); \
exit(-1); \
} \
}
#define FREE(PTR) { free((PTR)); (PTR) = NULL; }
#endif
/*** delcaration of routines ***/
inline int get_native_binary_type2();
inline PlyFile *ply_write(FILE *, int,const char **, int);
inline PlyFile *ply_open_for_writing(char *, int,const char **, int, float *);
inline void ply_describe_element(PlyFile *, const char *, int, int, PlyProperty *);
inline void ply_describe_property(PlyFile *, const char *, PlyProperty *);
inline void ply_element_count(PlyFile *, const char *, int);
inline void ply_header_complete(PlyFile *);
inline void ply_put_element_setup(PlyFile *, const char *);
inline void ply_put_element(PlyFile *, void *, int*);
inline void ply_put_comment(PlyFile *, char *);
inline void ply_put_obj_info(PlyFile *, char *);
inline PlyFile *ply_read(FILE *, int *, char ***);
inline PlyFile *ply_open_for_reading( const char *, int *, char ***, int *, float *);
inline PlyProperty **ply_get_element_description(PlyFile *, const char *, int*, int*);
inline void ply_get_element_setup( PlyFile *, const char *, int, PlyProperty *);
inline void ply_get_property(PlyFile *, const char *, PlyProperty *);
inline PlyOtherProp *ply_get_other_properties(PlyFile *, const char *, int);
inline void ply_get_element(PlyFile *, void *, int *);
inline char **ply_get_comments(PlyFile *, int *);
inline char **ply_get_obj_info(PlyFile *, int *);
inline void ply_close(PlyFile *);
inline void ply_get_info(PlyFile *, float *, int *);
inline PlyOtherElems *ply_get_other_element (PlyFile *, const char *, int);
inline void ply_describe_other_elements ( PlyFile *, PlyOtherElems *);
inline void ply_put_other_elements (PlyFile *);
inline void ply_free_other_elements (PlyOtherElems *);
inline void ply_describe_other_properties(PlyFile *, PlyOtherProp *, int);
inline int equal_strings(const char *, const char *);
}
}
#endif /* !__PLY_H__ */
/*
The interface routines for reading and writing PLY polygon files.
Greg Turk, February 1994
---------------------------------------------------------------
A PLY file contains a single polygonal _object_.
An object is composed of lists of _elements_. Typical elements are
vertices, faces, edges and materials.
Each type of element for a given object has one or more _properties_
associated with the element type. For instance, a vertex element may
have as properties the floating-point values x,y,z and the three unsigned
chars representing red, green and blue.
---------------------------------------------------------------
Copyright (c) 1994 The Board of Trustees of The Leland Stanford
Junior University. All rights reserved.
Permission to use, copy, modify and distribute this software and its
documentation for any purpose is hereby granted without fee, provided
that the above copyright notice and this permission notice appear in
all copies of this software and that you do not sell the software.
THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*/
/*
--------------------------------------------------------------------------------
Joao Fradinho Oliveira, July 2005
University College London
update for ply reading of multi OS ply files, in any OS (Unix, Macintosh, PC)
--------------------------------------------------------------------------------
ply_open_for_reading
* was changed to always open files in binary mode, files written in ascii can also be
read with this binary mode.
* allows opening of filenames that are alias files in macintosh
* code tested on pc and mac
get_words
* was changed to handle line breaks in UNIX, MACINTOSH, PC, it resets the file pointer
accordingly for the next read.
NOTES:
The ply file, has always an ascii part for the header, and a binary or ascii
part for the data.
The header part in ascii, dictates that linebreaks are used, this make models
operating system dependent, as a line break in unix is indicated with the escape character \n,
on a macintosh, with \r, and on a pc with \r\n <--2 unsigned chars, 2 bytes, instead of 1 byte.
get_words allows reading of any OS, text editors such as BBEdit do not save the linebreaks
properly to target OSs with binary files.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
//#include "ply.h"
namespace igl {
namespace ply {
// Use unnamed namespace to avoid duplicate symbols
/*
namespace
{
const char *type_names[] = {
"invalid",
"char", "short", "int",
"uchar", "ushort", "uint",
"float", "double",
};
// names of scalar types
const char *alt_type_names[] = {
"invalid",
"int8", "int16", "int32", "uint8", "uint16", "uint32", "float32", "float64",
};
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
}
typedef union
{
int int_value;
char byte_values[sizeof(int)];
} endian_test_type;
namespace
{
static int native_binary_type = -1;
static int types_checked = 0;
}
*/
#define NO_OTHER_PROPS -1
#define DONT_STORE_PROP 0
#define STORE_PROP 1
#define OTHER_PROP 0
#define NAMED_PROP 1
/* returns 1 if strings are equal, 0 if not */
inline int equal_strings(const char *, const char *);
/* find an element in a plyfile's list */
inline PlyElement *find_element(PlyFile *, const char *);
/* find a property in an element's list */
inline PlyProperty *find_property(PlyElement *, const char *, int *);
/* write to a file the word describing a PLY file data type */
inline void write_scalar_type (FILE *, int);
/* read a line from a file and break it up into separate words */
inline char **get_words(FILE *, int *, char **);
inline char **old_get_words(FILE *, int *);
/* write an item to a file */
inline void write_binary_item(FILE *, int, int, unsigned int, double, int, int*);
inline void write_ascii_item(FILE *, int, unsigned int, double, int);
inline double old_write_ascii_item(FILE *, char *, int);
/* add information to a PLY file descriptor */
inline void add_element(PlyFile *, char **);
inline void add_property(PlyFile *, char **);
inline void add_comment(PlyFile *, char *);
inline void add_obj_info(PlyFile *, char *);
/* copy a property */
inline void copy_property(PlyProperty *, PlyProperty *);
/* store a value into where a pointer and a type specify */
inline void store_item(char *, int, int, unsigned int, double);
/* return the value of a stored item */
inline void get_stored_item( void *, int, int *, unsigned int *, double *);
/* return the value stored in an item, given ptr to it and its type */
inline double get_item_value(char *, int);
/* get binary or ascii item and store it according to ptr and type */
inline void get_ascii_item(char *, int, int *, unsigned int *, double *);
inline void get_binary_item(FILE *, int, int, int *, unsigned int *, double *, int*);
/* get a bunch of elements from a file */
inline void ascii_get_element(PlyFile *, char *);
inline void binary_get_element(PlyFile *, char *, int*);
/* memory allocation */
inline char *my_alloc(int, int, const char *);
/* byte ordering */
inline void get_native_binary_type(int*);
inline void swap_bytes(char *, int);
inline int check_types();
/*************/
/* Writing */
/*************/
/******************************************************************************
Given a file pointer, get ready to write PLY data to the file.
Entry:
fp - the given file pointer
nelems - number of elements in object
elem_names - list of element names
file_type - file type, either ascii or binary
Exit:
returns a pointer to a PlyFile, used to refer to this file, or NULL if error
******************************************************************************/
inline PlyFile *ply_write(
FILE *fp,
int nelems,
const char **elem_names,
int file_type
)
{
int i;
PlyFile *plyfile;
PlyElement *elem;
/* check for NULL file pointer */
if (fp == NULL)
return (NULL);
int native_binary_type = -1;
int types_checked = 0;
if (native_binary_type == -1)
native_binary_type = get_native_binary_type2();
if (!types_checked)
types_checked = check_types();
/* create a record for this object */
plyfile = (PlyFile *) myalloc (sizeof (PlyFile));
if (file_type == PLY_BINARY_NATIVE)
plyfile->file_type = native_binary_type;
else
plyfile->file_type = file_type;
plyfile->num_comments = 0;
plyfile->num_obj_info = 0;
plyfile->nelems = nelems;
plyfile->version = 1.0;
plyfile->fp = fp;
plyfile->other_elems = NULL;
/* tuck aside the names of the elements */
plyfile->elems = (PlyElement **) myalloc (sizeof (PlyElement *) * nelems);
for (i = 0; i < nelems; i++) {
elem = (PlyElement *) myalloc (sizeof (PlyElement));
plyfile->elems[i] = elem;
elem->name = strdup (elem_names[i]);
elem->num = 0;
elem->nprops = 0;
}
/* return pointer to the file descriptor */
return (plyfile);
}
/******************************************************************************
Open a polygon file for writing.
Entry:
filename - name of file to read from
nelems - number of elements in object
elem_names - list of element names
file_type - file type, either ascii or binary
Exit:
version - version number of PLY file
returns a file identifier, used to refer to this file, or NULL if error
******************************************************************************/
inline PlyFile *ply_open_for_writing(
const char *filename,
int nelems,
const char **elem_names,
int file_type,
float *version
)
{
PlyFile *plyfile;
char *name;
FILE *fp;
/* tack on the extension .ply, if necessary */
name = (char *) myalloc (sizeof (char) * (strlen (filename) + 5));
strcpy (name, filename);
if (strlen (name) < 4 ||
strcmp (name + strlen (name) - 4, ".ply") != 0)
strcat (name, ".ply");
/* open the file for writing */
fp = fopen (name, "w");
if (fp == NULL) {
free(name);
return (NULL);
}
free(name);
/* create the actual PlyFile structure */
plyfile = ply_write (fp, nelems, elem_names, file_type);
if (plyfile == NULL)
return (NULL);
/* say what PLY file version number we're writing */
*version = plyfile->version;
/* return pointer to the file descriptor */
return (plyfile);
}
/******************************************************************************
Describe an element, including its properties and how many will be written
to the file.
Entry:
plyfile - file identifier
elem_name - name of element that information is being specified about
nelems - number of elements of this type to be written
nprops - number of properties contained in the element
prop_list - list of properties
******************************************************************************/
inline void ply_describe_element(
PlyFile *plyfile,
const char *elem_name,
int nelems,
int nprops,
PlyProperty *prop_list
)
{
int i;
PlyElement *elem;
PlyProperty *prop;
/* look for appropriate element */
elem = find_element (plyfile, elem_name);
if (elem == NULL) {
fprintf(stderr,"ply_describe_element: can't find element '%s'\n",elem_name);
exit (-1);
}
elem->num = nelems;
/* copy the list of properties */
elem->nprops = nprops;
elem->props = (PlyProperty **) myalloc (sizeof (PlyProperty *) * nprops);
elem->store_prop = (char *) myalloc (sizeof (char) * nprops);
for (i = 0; i < nprops; i++) {
prop = (PlyProperty *) myalloc (sizeof (PlyProperty));
elem->props[i] = prop;
elem->store_prop[i] = NAMED_PROP;
copy_property (prop, &prop_list[i]);
}
}
/******************************************************************************
Describe a property of an element.
Entry:
plyfile - file identifier
elem_name - name of element that information is being specified about
prop - the new property
******************************************************************************/
inline void ply_describe_property(
PlyFile *plyfile,
const char *elem_name,
PlyProperty *prop
)
{
PlyElement *elem;
PlyProperty *elem_prop;
/* look for appropriate element */
elem = find_element (plyfile, elem_name);
if (elem == NULL) {
fprintf(stderr, "ply_describe_property: can't find element '%s'\n",
elem_name);
return;
}
/* create room for new property */
if (elem->nprops == 0) {
elem->props = (PlyProperty **) myalloc (sizeof (PlyProperty *));
elem->store_prop = (char *) myalloc (sizeof (char));
elem->nprops = 1;
}
else {
elem->nprops++;
elem->props = (PlyProperty **)
realloc (elem->props, sizeof (PlyProperty *) * elem->nprops);
elem->store_prop = (char *)
realloc (elem->store_prop, sizeof (char) * elem->nprops);
}
/* copy the new property */
elem_prop = (PlyProperty *) myalloc (sizeof (PlyProperty));
elem->props[elem->nprops - 1] = elem_prop;
elem->store_prop[elem->nprops - 1] = NAMED_PROP;
copy_property (elem_prop, prop);
}
/******************************************************************************
Describe what the "other" properties are that are to be stored, and where
they are in an element.
******************************************************************************/
inline void ply_describe_other_properties(
PlyFile *plyfile,
PlyOtherProp *other,
int offset
)
{
int i;
PlyElement *elem;
PlyProperty *prop;
/* look for appropriate element */
elem = find_element (plyfile, other->name);
if (elem == NULL) {
fprintf(stderr, "ply_describe_other_properties: can't find element '%s'\n",
other->name);
return;
}
/* create room for other properties */
if (elem->nprops == 0) {
elem->props = (PlyProperty **)
myalloc (sizeof (PlyProperty *) * other->nprops);
elem->store_prop = (char *) myalloc (sizeof (char) * other->nprops);
elem->nprops = 0;
}
else {
int newsize;
newsize = elem->nprops + other->nprops;
elem->props = (PlyProperty **)
realloc (elem->props, sizeof (PlyProperty *) * newsize);
elem->store_prop = (char *)
realloc (elem->store_prop, sizeof (char) * newsize);
}
/* copy the other properties */
for (i = 0; i < other->nprops; i++) {
prop = (PlyProperty *) myalloc (sizeof (PlyProperty));
copy_property (prop, other->props[i]);
elem->props[elem->nprops] = prop;
elem->store_prop[elem->nprops] = OTHER_PROP;
elem->nprops++;
}
/* save other info about other properties */
elem->other_size = other->size;
elem->other_offset = offset;
}
/******************************************************************************
State how many of a given element will be written.
Entry:
plyfile - file identifier
elem_name - name of element that information is being specified about
nelems - number of elements of this type to be written
******************************************************************************/
inline void ply_element_count(
PlyFile *plyfile,
const char *elem_name,
int nelems
)
{
PlyElement *elem;
/* look for appropriate element */
elem = find_element (plyfile, elem_name);
if (elem == NULL) {
fprintf(stderr,"ply_element_count: can't find element '%s'\n",elem_name);
exit (-1);
}
elem->num = nelems;
}
/******************************************************************************
Signal that we've described everything a PLY file's header and that the
header should be written to the file.
Entry:
plyfile - file identifier
******************************************************************************/
inline void ply_header_complete(PlyFile *plyfile)
{
int i,j;
FILE *fp = plyfile->fp;
PlyElement *elem;
PlyProperty *prop;
fprintf (fp, "ply\n");
switch (plyfile->file_type) {
case PLY_ASCII:
fprintf (fp, "format ascii 1.0\n");
break;
case PLY_BINARY_BE:
fprintf (fp, "format binary_big_endian 1.0\n");
break;
case PLY_BINARY_LE:
fprintf (fp, "format binary_little_endian 1.0\n");
break;
default:
fprintf (stderr, "ply_header_complete: bad file type = %d\n",
plyfile->file_type);
exit (-1);
}
/* write out the comments */
for (i = 0; i < plyfile->num_comments; i++)
fprintf (fp, "comment %s\n", plyfile->comments[i]);
/* write out object information */
for (i = 0; i < plyfile->num_obj_info; i++)
fprintf (fp, "obj_info %s\n", plyfile->obj_info[i]);
/* write out information about each element */
for (i = 0; i < plyfile->nelems; i++) {
elem = plyfile->elems[i];
fprintf (fp, "element %s %d\n", elem->name, elem->num);
/* write out each property */
for (j = 0; j < elem->nprops; j++) {
prop = elem->props[j];
if (prop->is_list) {
fprintf (fp, "property list ");
write_scalar_type (fp, prop->count_external);
fprintf (fp, " ");
write_scalar_type (fp, prop->external_type);
fprintf (fp, " %s\n", prop->name);
}
else {
fprintf (fp, "property ");
write_scalar_type (fp, prop->external_type);
fprintf (fp, " %s\n", prop->name);
}
}
}
fprintf (fp, "end_header\n");
}
/******************************************************************************
Specify which elements are going to be written. This should be called
before a call to the routine ply_put_element().
Entry:
plyfile - file identifier
elem_name - name of element we're talking about
******************************************************************************/
inline void ply_put_element_setup(PlyFile *plyfile, const char *elem_name)
{
PlyElement *elem;
elem = find_element (plyfile, elem_name);
if (elem == NULL) {
fprintf(stderr, "ply_elements_setup: can't find element '%s'\n", elem_name);
exit (-1);
}
plyfile->which_elem = elem;
}
/******************************************************************************
Write an element to the file. This routine assumes that we're
writing the type of element specified in the last call to the routine
ply_put_element_setup().
Entry:
plyfile - file identifier
elem_ptr - pointer to the element
******************************************************************************/
inline void ply_put_element(PlyFile *plyfile, void *elem_ptr, int *native_binary_type)
{
int j,k;
FILE *fp = plyfile->fp;
PlyElement *elem;
PlyProperty *prop;
char *elem_data,*item;
char **item_ptr;
int list_count;
int item_size;
int int_val;
unsigned int uint_val;
double double_val;
char **other_ptr;
elem = plyfile->which_elem;
elem_data = (char *)elem_ptr;
other_ptr = (char **) (((char *) elem_ptr) + elem->other_offset);
/* write out either to an ascii or binary file */
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
if (plyfile->file_type == PLY_ASCII) {
/* write an ascii file */
/* write out each property of the element */
for (j = 0; j < elem->nprops; j++) {
prop = elem->props[j];
if (elem->store_prop[j] == OTHER_PROP)
elem_data = *other_ptr;
else
elem_data = (char *)elem_ptr;
if (prop->is_list) {
item = elem_data + prop->count_offset;
get_stored_item ((void *) item, prop->count_internal,
&int_val, &uint_val, &double_val);
write_ascii_item (fp, int_val, uint_val, double_val,
prop->count_external);
list_count = uint_val;
item_ptr = (char **) (elem_data + prop->offset);
item = item_ptr[0];
item_size = ply_type_size[prop->internal_type];
for (k = 0; k < list_count; k++) {
get_stored_item ((void *) item, prop->internal_type,
&int_val, &uint_val, &double_val);
write_ascii_item (fp, int_val, uint_val, double_val,
prop->external_type);
item += item_size;
}
}
else {
item = elem_data + prop->offset;
get_stored_item ((void *) item, prop->internal_type,
&int_val, &uint_val, &double_val);
write_ascii_item (fp, int_val, uint_val, double_val,
prop->external_type);
}
}
fprintf (fp, "\n");
}
else {
/* write a binary file */
/* write out each property of the element */
for (j = 0; j < elem->nprops; j++) {
prop = elem->props[j];
if (elem->store_prop[j] == OTHER_PROP)
elem_data = *other_ptr;
else
elem_data = (char *)elem_ptr;
if (prop->is_list) {
item = elem_data + prop->count_offset;
item_size = ply_type_size[prop->count_internal];
get_stored_item ((void *) item, prop->count_internal,
&int_val, &uint_val, &double_val);
write_binary_item (fp, plyfile->file_type, int_val, uint_val,
double_val, prop->count_external, native_binary_type);
list_count = uint_val;
item_ptr = (char **) (elem_data + prop->offset);
item = item_ptr[0];
item_size = ply_type_size[prop->internal_type];
for (k = 0; k < list_count; k++) {
get_stored_item ((void *) item, prop->internal_type,
&int_val, &uint_val, &double_val);
write_binary_item (fp, plyfile->file_type, int_val, uint_val,
double_val, prop->external_type, native_binary_type);
item += item_size;
}
}
else {
item = elem_data + prop->offset;
item_size = ply_type_size[prop->internal_type];
get_stored_item ((void *) item, prop->internal_type,
&int_val, &uint_val, &double_val);
write_binary_item (fp, plyfile->file_type, int_val, uint_val,
double_val, prop->external_type, native_binary_type);
}
}
}
}
/******************************************************************************
Specify a comment that will be written in the header.
Entry:
plyfile - file identifier
comment - the comment to be written
******************************************************************************/
inline void ply_put_comment(PlyFile *plyfile, char *comment)
{
/* (re)allocate space for new comment */
if (plyfile->num_comments == 0)
plyfile->comments = (char **) myalloc (sizeof (char *));
else
plyfile->comments = (char **) realloc (plyfile->comments,
sizeof (char *) * (plyfile->num_comments + 1));
/* add comment to list */
plyfile->comments[plyfile->num_comments] = strdup (comment);
plyfile->num_comments++;
}
/******************************************************************************
Specify a piece of object information (arbitrary text) that will be written
in the header.
Entry:
plyfile - file identifier
obj_info - the text information to be written
******************************************************************************/
inline void ply_put_obj_info(PlyFile *plyfile, char *obj_info)
{
/* (re)allocate space for new info */
if (plyfile->num_obj_info == 0)
plyfile->obj_info = (char **) myalloc (sizeof (char *));
else
plyfile->obj_info = (char **) realloc (plyfile->obj_info,
sizeof (char *) * (plyfile->num_obj_info + 1));
/* add info to list */
plyfile->obj_info[plyfile->num_obj_info] = strdup (obj_info);
plyfile->num_obj_info++;
}
/*************/
/* Reading */
/*************/
/******************************************************************************
Given a file pointer, get ready to read PLY data from the file.
Entry:
fp - the given file pointer
Exit:
nelems - number of elements in object
elem_names - list of element names
returns a pointer to a PlyFile, used to refer to this file, or NULL if error
******************************************************************************/
inline PlyFile *ply_read(FILE *fp, int *nelems, char ***elem_names)
{
int i,j;
PlyFile *plyfile;
int nwords;
char **words;
char **elist;
PlyElement *elem;
char *orig_line;
/* check for NULL file pointer */
if (fp == NULL)
return (NULL);
int native_binary_type = -1;
int types_checked = 0;
if (native_binary_type == -1)
native_binary_type = get_native_binary_type2();
if (!types_checked)
types_checked = check_types();
/* create record for this object */
plyfile = (PlyFile *) myalloc (sizeof (PlyFile));
plyfile->nelems = 0;
plyfile->comments = NULL;
plyfile->num_comments = 0;
plyfile->obj_info = NULL;
plyfile->num_obj_info = 0;
plyfile->fp = fp;
plyfile->other_elems = NULL;
/* read and parse the file's header */
words = get_words (plyfile->fp, &nwords, &orig_line);
if (nwords == 0 || !words || !equal_strings (words[0], "ply"))
{
if (words)
free(words);
return (NULL);
}
while (words) {
/* parse words */
if (equal_strings (words[0], "format")) {
if (nwords != 3) {
free(words);
return (NULL);
}
if (equal_strings (words[1], "ascii"))
plyfile->file_type = PLY_ASCII;
else if (equal_strings (words[1], "binary_big_endian"))
plyfile->file_type = PLY_BINARY_BE;
else if (equal_strings (words[1], "binary_little_endian"))
plyfile->file_type = PLY_BINARY_LE;
else {
free(words);
return (NULL);
}
plyfile->version = atof (words[2]);
}
else if (equal_strings (words[0], "element"))
add_element (plyfile, words);
else if (equal_strings (words[0], "property"))
add_property (plyfile, words);
else if (equal_strings (words[0], "comment"))
add_comment (plyfile, orig_line);
else if (equal_strings (words[0], "obj_info"))
add_obj_info (plyfile, orig_line);
else if (equal_strings (words[0], "end_header")) {
free(words);
break;
}
/* free up words space */
free (words);
words = get_words (plyfile->fp, &nwords, &orig_line);
}
/* create tags for each property of each element, to be used */
/* later to say whether or not to store each property for the user */
for (i = 0; i < plyfile->nelems; i++) {
elem = plyfile->elems[i];
elem->store_prop = (char *) myalloc (sizeof (char) * elem->nprops);
for (j = 0; j < elem->nprops; j++)
elem->store_prop[j] = DONT_STORE_PROP;
elem->other_offset = NO_OTHER_PROPS; /* no "other" props by default */
}
/* set return values about the elements */
elist = (char **) myalloc (sizeof (char *) * plyfile->nelems);
for (i = 0; i < plyfile->nelems; i++)
elist[i] = strdup (plyfile->elems[i]->name);
*elem_names = elist;
*nelems = plyfile->nelems;
/* return a pointer to the file's information */
return (plyfile);
}
/******************************************************************************
Open a polygon file for reading.
Entry:
filename - name of file to read from
Exit:
nelems - number of elements in object
elem_names - list of element names
file_type - file type, either ascii or binary
version - version number of PLY file
returns a file identifier, used to refer to this file, or NULL if error
******************************************************************************/
inline PlyFile *ply_open_for_reading(
char *filename,
int *nelems,
char ***elem_names,
int *file_type,
float *version
)
{
FILE *fp;
PlyFile *plyfile;
//char *name;
/* tack on the extension .ply, if necessary */
// removing below, to handle also macintosh alias filenames
//name = (char *) myalloc (sizeof (char) * (strlen (filename) + 5));
//strcpy (name, filename);
//if (strlen (name) < 4 ||
// strcmp (name + strlen (name) - 4, ".ply") != 0)
// strcat (name, ".ply");
/* open the file for reading */
//fp = fopen (name, "r");
//opening file in binary, ascii data can be read in binary with get_words
fp = fopen (filename, "rb");
if (fp == NULL)
return (NULL);
/* create the PlyFile data structure */
plyfile = ply_read (fp, nelems, elem_names);
/* determine the file type and version */
*file_type = plyfile->file_type;
*version = plyfile->version;
/* return a pointer to the file's information */
return (plyfile);
}
/******************************************************************************
Get information about a particular element.
Entry:
plyfile - file identifier
elem_name - name of element to get information about
Exit:
nelems - number of elements of this type in the file
nprops - number of properties
returns a list of properties, or NULL if the file doesn't contain that elem
******************************************************************************/
inline PlyProperty **ply_get_element_description(
PlyFile *plyfile,
const char *elem_name,
int *nelems,
int *nprops
)
{
int i;
PlyElement *elem;
PlyProperty *prop;
PlyProperty **prop_list;
/* find information about the element */
elem = find_element (plyfile, elem_name);
if (elem == NULL)
return (NULL);
*nelems = elem->num;
*nprops = elem->nprops;
/* make a copy of the element's property list */
prop_list = (PlyProperty **) myalloc (sizeof (PlyProperty *) * elem->nprops);
for (i = 0; i < elem->nprops; i++) {
prop = (PlyProperty *) myalloc (sizeof (PlyProperty));
copy_property (prop, elem->props[i]);
prop_list[i] = prop;
}
/* return this duplicate property list */
return (prop_list);
}
/******************************************************************************
Specify which properties of an element are to be returned. This should be
called before a call to the routine ply_get_element().
Entry:
plyfile - file identifier
elem_name - which element we're talking about
nprops - number of properties
prop_list - list of properties
******************************************************************************/
inline void ply_get_element_setup(
PlyFile *plyfile,
const char *elem_name,
int nprops,
PlyProperty *prop_list
)
{
int i;
PlyElement *elem;
PlyProperty *prop;
int index;
/* find information about the element */
elem = find_element (plyfile, elem_name);
plyfile->which_elem = elem;
/* deposit the property information into the element's description */
for (i = 0; i < nprops; i++) {
/* look for actual property */
prop = find_property (elem, prop_list[i].name, &index);
if (prop == NULL) {
fprintf (stderr, "Warning: Can't find property '%s' in element '%s'\n",
prop_list[i].name, elem_name);
continue;
}
/* store its description */
prop->internal_type = prop_list[i].internal_type;
prop->offset = prop_list[i].offset;
prop->count_internal = prop_list[i].count_internal;
prop->count_offset = prop_list[i].count_offset;
/* specify that the user wants this property */
elem->store_prop[index] = STORE_PROP;
}
}
/******************************************************************************
Specify a property of an element that is to be returned. This should be
called (usually multiple times) before a call to the routine ply_get_element().
This routine should be used in preference to the less flexible old routine
called ply_get_element_setup().
Entry:
plyfile - file identifier
elem_name - which element we're talking about
prop - property to add to those that will be returned
******************************************************************************/
inline void ply_get_property(
PlyFile *plyfile,
const char *elem_name,
PlyProperty *prop
)
{
PlyElement *elem;
PlyProperty *prop_ptr;
int index;
/* find information about the element */
elem = find_element (plyfile, elem_name);
plyfile->which_elem = elem;
/* deposit the property information into the element's description */
prop_ptr = find_property (elem, prop->name, &index);
if (prop_ptr == NULL) {
fprintf (stderr, "Warning: Can't find property '%s' in element '%s'\n",
prop->name, elem_name);
return;
}
prop_ptr->internal_type = prop->internal_type;
prop_ptr->offset = prop->offset;
prop_ptr->count_internal = prop->count_internal;
prop_ptr->count_offset = prop->count_offset;
/* specify that the user wants this property */
elem->store_prop[index] = STORE_PROP;
}
/******************************************************************************
Read one element from the file. This routine assumes that we're reading
the type of element specified in the last call to the routine
ply_get_element_setup().
Entry:
plyfile - file identifier
elem_ptr - pointer to location where the element information should be put
******************************************************************************/
inline void ply_get_element(PlyFile *plyfile, void *elem_ptr, int *native_binary_type)
{
if (plyfile->file_type == PLY_ASCII)
ascii_get_element (plyfile, (char *) elem_ptr);
else
binary_get_element (plyfile, (char *) elem_ptr, native_binary_type);
}
/******************************************************************************
Extract the comments from the header information of a PLY file.
Entry:
plyfile - file identifier
Exit:
num_comments - number of comments returned
returns a pointer to a list of comments
******************************************************************************/
inline char **ply_get_comments(PlyFile *plyfile, int *num_comments)
{
*num_comments = plyfile->num_comments;
return (plyfile->comments);
}
/******************************************************************************
Extract the object information (arbitrary text) from the header information
of a PLY file.
Entry:
plyfile - file identifier
Exit:
num_obj_info - number of lines of text information returned
returns a pointer to a list of object info lines
******************************************************************************/
inline char **ply_get_obj_info(PlyFile *plyfile, int *num_obj_info)
{
*num_obj_info = plyfile->num_obj_info;
return (plyfile->obj_info);
}
/******************************************************************************
Make ready for "other" properties of an element-- those properties that
the user has not explicitly asked for, but that are to be stashed away
in a special structure to be carried along with the element's other
information.
Entry:
plyfile - file identifier
elem - element for which we want to save away other properties
******************************************************************************/
inline void setup_other_props(PlyElement *elem)
{
int i;
PlyProperty *prop;
int size = 0;
int type_size;
/* Examine each property in decreasing order of size. */
/* We do this so that all data types will be aligned by */
/* word, half-word, or whatever within the structure. */
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
for (type_size = 8; type_size > 0; type_size /= 2) {
/* add up the space taken by each property, and save this information */
/* away in the property descriptor */
for (i = 0; i < elem->nprops; i++) {
/* don't bother with properties we've been asked to store explicitly */
if (elem->store_prop[i])
continue;
prop = elem->props[i];
/* internal types will be same as external */
prop->internal_type = prop->external_type;
prop->count_internal = prop->count_external;
/* check list case */
if (prop->is_list) {
/* pointer to list */
if (type_size == sizeof (void *)) {
prop->offset = size;
size += sizeof (void *); /* always use size of a pointer here */
}
/* count of number of list elements */
if (type_size == ply_type_size[prop->count_external]) {
prop->count_offset = size;
size += ply_type_size[prop->count_external];
}
}
/* not list */
else if (type_size == ply_type_size[prop->external_type]) {
prop->offset = size;
size += ply_type_size[prop->external_type];
}
}
}
/* save the size for the other_props structure */
elem->other_size = size;
}
/******************************************************************************
Specify that we want the "other" properties of an element to be tucked
away within the user's structure. The user needn't be concerned for how
these properties are stored.
Entry:
plyfile - file identifier
elem_name - name of element that we want to store other_props in
offset - offset to where other_props will be stored inside user's structure
Exit:
returns pointer to structure containing description of other_props
******************************************************************************/
inline PlyOtherProp *ply_get_other_properties(
PlyFile *plyfile,
const char *elem_name,
int offset
)
{
int i;
PlyElement *elem;
PlyOtherProp *other;
PlyProperty *prop;
int nprops;
/* find information about the element */
elem = find_element (plyfile, elem_name);
if (elem == NULL) {
fprintf (stderr, "ply_get_other_properties: Can't find element '%s'\n",
elem_name);
return (NULL);
}
/* remember that this is the "current" element */
plyfile->which_elem = elem;
/* save the offset to where to store the other_props */
elem->other_offset = offset;
/* place the appropriate pointers, etc. in the element's property list */
setup_other_props (elem);
/* create structure for describing other_props */
other = (PlyOtherProp *) myalloc (sizeof (PlyOtherProp));
other->name = strdup (elem_name);
#if 0
if (elem->other_offset == NO_OTHER_PROPS) {
other->size = 0;
other->props = NULL;
other->nprops = 0;
return (other);
}
#endif
other->size = elem->other_size;
other->props = (PlyProperty **) myalloc (sizeof(PlyProperty) * elem->nprops);
/* save descriptions of each "other" property */
nprops = 0;
for (i = 0; i < elem->nprops; i++) {
if (elem->store_prop[i])
continue;
prop = (PlyProperty *) myalloc (sizeof (PlyProperty));
copy_property (prop, elem->props[i]);
other->props[nprops] = prop;
nprops++;
}
other->nprops = nprops;
#if 1
/* set other_offset pointer appropriately if there are NO other properties */
if (other->nprops == 0) {
elem->other_offset = NO_OTHER_PROPS;
}
#endif
/* return structure */
return (other);
}
/*************************/
/* Other Element Stuff */
/*************************/
/******************************************************************************
Grab all the data for an element that a user does not want to explicitly
read in.
Entry:
plyfile - pointer to file
elem_name - name of element whose data is to be read in
elem_count - number of instances of this element stored in the file
Exit:
returns pointer to ALL the "other" element data for this PLY file
******************************************************************************/
inline PlyOtherElems *ply_get_other_element (
PlyFile *plyfile,
char *elem_name,
int elem_count
)
{
int i;
PlyElement *elem;
PlyOtherElems *other_elems;
OtherElem *other;
/* look for appropriate element */
elem = find_element (plyfile, elem_name);
if (elem == NULL) {
fprintf (stderr,
"ply_get_other_element: can't find element '%s'\n", elem_name);
exit (-1);
}
/* create room for the new "other" element, initializing the */
/* other data structure if necessary */
if (plyfile->other_elems == NULL) {
plyfile->other_elems = (PlyOtherElems *) myalloc (sizeof (PlyOtherElems));
other_elems = plyfile->other_elems;
other_elems->other_list = (OtherElem *) myalloc (sizeof (OtherElem));
other = &(other_elems->other_list[0]);
other_elems->num_elems = 1;
}
else {
other_elems = plyfile->other_elems;
other_elems->other_list = (OtherElem *) realloc (other_elems->other_list,
sizeof (OtherElem) * (other_elems->num_elems + 1));
other = &(other_elems->other_list[other_elems->num_elems]);
other_elems->num_elems++;
}
/* count of element instances in file */
other->elem_count = elem_count;
/* save name of element */
other->elem_name = strdup (elem_name);
/* create a list to hold all the current elements */
other->other_data = (OtherData **)
malloc (sizeof (OtherData *) * other->elem_count);
/* set up for getting elements */
other->other_props = ply_get_other_properties (plyfile, elem_name,
offsetof(OtherData,other_props));
/* grab all these elements */
int native_binary_type = get_native_binary_type2();
for (i = 0; i < other->elem_count; i++) {
/* grab and element from the file */
other->other_data[i] = (OtherData *) malloc (sizeof (OtherData));
ply_get_element (plyfile, (void *) other->other_data[i], &native_binary_type);
}
/* return pointer to the other elements data */
return (other_elems);
}
/******************************************************************************
Pass along a pointer to "other" elements that we want to save in a given
PLY file. These other elements were presumably read from another PLY file.
Entry:
plyfile - file pointer in which to store this other element info
other_elems - info about other elements that we want to store
******************************************************************************/
inline void ply_describe_other_elements (
PlyFile *plyfile,
PlyOtherElems *other_elems
)
{
int i;
OtherElem *other;
PlyElement *elem;
/* ignore this call if there is no other element */
if (other_elems == NULL)
return;
/* save pointer to this information */
plyfile->other_elems = other_elems;
/* describe the other properties of this element */
/* store them in the main element list as elements with
only other properties */
REALLOCN(plyfile->elems, PlyElement *,
plyfile->nelems, plyfile->nelems + other_elems->num_elems);
for (i = 0; i < other_elems->num_elems; i++) {
other = &(other_elems->other_list[i]);
elem = (PlyElement *) myalloc (sizeof (PlyElement));
plyfile->elems[plyfile->nelems++] = elem;
elem->name = strdup (other->elem_name);
elem->num = other->elem_count;
elem->nprops = 0;
ply_describe_other_properties (plyfile, other->other_props,
offsetof(OtherData,other_props));
}
}
/******************************************************************************
Write out the "other" elements specified for this PLY file.
Entry:
plyfile - pointer to PLY file to write out other elements for
******************************************************************************/
inline void ply_put_other_elements (PlyFile *plyfile, int *native_binary_type)
{
int i,j;
OtherElem *other;
/* make sure we have other elements to write */
if (plyfile->other_elems == NULL)
return;
/* write out the data for each "other" element */
for (i = 0; i < plyfile->other_elems->num_elems; i++) {
other = &(plyfile->other_elems->other_list[i]);
ply_put_element_setup (plyfile, other->elem_name);
/* write out each instance of the current element */
for (j = 0; j < other->elem_count; j++)
ply_put_element (plyfile, (void *) other->other_data[j], native_binary_type);
}
}
/******************************************************************************
Free up storage used by an "other" elements data structure.
Entry:
other_elems - data structure to free up
******************************************************************************/
inline void ply_free_other_elements (PlyOtherElems *other_elems)
{
// Alec:
//other_elems = other_elems;
delete(other_elems);
}
/*******************/
/* Miscellaneous */
/*******************/
/******************************************************************************
Close a PLY file.
Entry:
plyfile - identifier of file to close
******************************************************************************/
inline void ply_close(PlyFile *plyfile)
{
fclose (plyfile->fp);
// Alec:
plyfile->fp = NULL;
/* free up memory associated with the PLY file */
free (plyfile);
}
/******************************************************************************
Get version number and file type of a PlyFile.
Entry:
ply - pointer to PLY file
Exit:
version - version of the file
file_type - PLY_ASCII, PLY_BINARY_BE, or PLY_BINARY_LE
******************************************************************************/
inline void ply_get_info(PlyFile *ply, float *version, int *file_type)
{
if (ply == NULL)
return;
*version = ply->version;
*file_type = ply->file_type;
}
/******************************************************************************
Compare two strings. Returns 1 if they are the same, 0 if not.
******************************************************************************/
inline int equal_strings(const char *s1, const char *s2)
{
while (*s1 && *s2)
if (*s1++ != *s2++)
return (0);
if (*s1 != *s2)
return (0);
else
return (1);
}
/******************************************************************************
Find an element from the element list of a given PLY object.
Entry:
plyfile - file id for PLY file
element - name of element we're looking for
Exit:
returns the element, or NULL if not found
******************************************************************************/
inline PlyElement *find_element(PlyFile *plyfile, const char *element)
{
int i;
for (i = 0; i < plyfile->nelems; i++)
if (equal_strings (element, plyfile->elems[i]->name))
return (plyfile->elems[i]);
return (NULL);
}
/******************************************************************************
Find a property in the list of properties of a given element.
Entry:
elem - pointer to element in which we want to find the property
prop_name - name of property to find
Exit:
index - index to position in list
returns a pointer to the property, or NULL if not found
******************************************************************************/
inline PlyProperty *find_property(PlyElement *elem, const char *prop_name, int *index)
{
int i;
for (i = 0; i < elem->nprops; i++)
if (equal_strings (prop_name, elem->props[i]->name)) {
*index = i;
return (elem->props[i]);
}
*index = -1;
return (NULL);
}
/******************************************************************************
Read an element from an ascii file.
Entry:
plyfile - file identifier
elem_ptr - pointer to element
******************************************************************************/
inline void ascii_get_element(PlyFile *plyfile, char *elem_ptr)
{
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
int j,k;
PlyElement *elem;
PlyProperty *prop;
char **words;
int nwords;
int which_word;
char *elem_data,*item=NULL;
char *item_ptr;
int item_size;
int int_val;
unsigned int uint_val;
double double_val;
int list_count;
int store_it;
char **store_array;
char *orig_line;
char *other_data=NULL;
int other_flag;
/* the kind of element we're reading currently */
elem = plyfile->which_elem;
/* do we need to setup for other_props? */
if (elem->other_offset != NO_OTHER_PROPS) {
char **ptr;
other_flag = 1;
/* make room for other_props */
other_data = (char *) myalloc (elem->other_size);
/* store pointer in user's structure to the other_props */
ptr = (char **) (elem_ptr + elem->other_offset);
*ptr = other_data;
}
else
other_flag = 0;
/* read in the element */
words = get_words (plyfile->fp, &nwords, &orig_line);
if (words == NULL) {
fprintf (stderr, "ply_get_element: unexpected end of file\n");
exit (-1);
}
which_word = 0;
for (j = 0; j < elem->nprops; j++) {
prop = elem->props[j];
store_it = (elem->store_prop[j] | other_flag);
/* store either in the user's structure or in other_props */
// if (elem->store_prop[j])
elem_data = elem_ptr;
//else
//elem_data = other_data;
if (prop->is_list) { /* a list */
/* get and store the number of items in the list */
get_ascii_item (words[which_word++], prop->count_external,
&int_val, &uint_val, &double_val);
if (store_it) {
item = elem_data + prop->count_offset;
store_item(item, prop->count_internal, int_val, uint_val, double_val);
}
/* allocate space for an array of items and store a ptr to the array */
list_count = int_val;
item_size = ply_type_size[prop->internal_type];
store_array = (char **) (elem_data + prop->offset);
if (list_count == 0) {
if (store_it)
*store_array = NULL;
}
else {
if (store_it) {
item_ptr = (char *) myalloc (sizeof (char) * item_size * list_count);
item = item_ptr;
*store_array = item_ptr;
}
/* read items and store them into the array */
for (k = 0; k < list_count; k++) {
get_ascii_item (words[which_word++], prop->external_type,
&int_val, &uint_val, &double_val);
if (store_it) {
store_item (item, prop->internal_type,
int_val, uint_val, double_val);
item += item_size;
}
}
}
}
else { /* not a list */
get_ascii_item (words[which_word++], prop->external_type,
&int_val, &uint_val, &double_val);
if (store_it) {
item = elem_data + prop->offset;
store_item (item, prop->internal_type, int_val, uint_val, double_val);
}
}
}
free (words);
}
/******************************************************************************
Read an element from a binary file.
Entry:
plyfile - file identifier
elem_ptr - pointer to an element
******************************************************************************/
inline void binary_get_element(PlyFile *plyfile, char *elem_ptr, int *native_binary_type)
{
int j,k;
PlyElement *elem;
PlyProperty *prop;
FILE *fp = plyfile->fp;
char *elem_data,*item=NULL;
char *item_ptr;
int item_size;
int int_val;
unsigned int uint_val;
double double_val;
int list_count;
int store_it;
char **store_array;
char *other_data=NULL;
int other_flag;
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
/* the kind of element we're reading currently */
elem = plyfile->which_elem;
/* do we need to setup for other_props? */
if (elem->other_offset != NO_OTHER_PROPS) {
char **ptr;
other_flag = 1;
/* make room for other_props */
other_data = (char *) myalloc (elem->other_size);
/* store pointer in user's structure to the other_props */
ptr = (char **) (elem_ptr + elem->other_offset);
*ptr = other_data;
}
else
other_flag = 0;
/* read in a number of elements */
for (j = 0; j < elem->nprops; j++) {
prop = elem->props[j];
store_it = (elem->store_prop[j] | other_flag);
/* store either in the user's structure or in other_props */
// if (elem->store_prop[j])
elem_data = elem_ptr;
// else
// elem_data = other_data;
if (prop->is_list) { /* a list */
/* get and store the number of items in the list */
get_binary_item (fp, plyfile->file_type, prop->count_external,
&int_val, &uint_val, &double_val, native_binary_type);
if (store_it) {
item = elem_data + prop->count_offset;
store_item(item, prop->count_internal, int_val, uint_val, double_val);
}
/* allocate space for an array of items and store a ptr to the array */
list_count = int_val;
item_size = ply_type_size[prop->internal_type];
store_array = (char **) (elem_data + prop->offset);
if (list_count == 0) {
if (store_it)
*store_array = NULL;
}
else {
if (store_it) {
item_ptr = (char *) myalloc (sizeof (char) * item_size * list_count);
item = item_ptr;
*store_array = item_ptr;
}
// read items and store them into the array
for (k = 0; k < list_count; k++) {
get_binary_item (fp, plyfile->file_type, prop->external_type,
&int_val, &uint_val, &double_val, native_binary_type);
if (store_it) {
store_item (item, prop->internal_type,
int_val, uint_val, double_val);
item += item_size;
}
}
}
}
else { /* not a list */
get_binary_item (fp, plyfile->file_type, prop->external_type,
&int_val, &uint_val, &double_val, native_binary_type);
if (store_it) {
item = elem_data + prop->offset;
store_item (item, prop->internal_type, int_val, uint_val, double_val);
}
}
}
}
/******************************************************************************
Write to a file the word that represents a PLY data type.
Entry:
fp - file pointer
code - code for type
******************************************************************************/
inline void write_scalar_type (FILE *fp, int code)
{
/* make sure this is a valid code */
if (code <= PLY_START_TYPE || code >= PLY_END_TYPE) {
fprintf (stderr, "write_scalar_type: bad data code = %d\n", code);
exit (-1);
}
/* write the code to a file */
const char *type_names[] = {
"invalid",
"char", "short", "int",
"uchar", "ushort", "uint",
"float", "double",
};
fprintf (fp, "%s", type_names[code]);
}
/******************************************************************************
Reverse the order in an array of bytes. This is the conversion from big
endian to little endian and vice versa
Entry:
bytes - array of bytes to reverse (in place)
num_bytes - number of bytes in array
******************************************************************************/
inline void swap_bytes(char *bytes, int num_bytes)
{
int i;
char temp;
for (i=0; i < num_bytes/2; i++)
{
temp = bytes[i];
bytes[i] = bytes[(num_bytes-1)-i];
bytes[(num_bytes-1)-i] = temp;
}
}
/******************************************************************************
Find out if this machine is big endian or little endian
Exit:
set global variable, native_binary_type =
either PLY_BINARY_BE or PLY_BINARY_LE
******************************************************************************/
inline void get_native_binary_type(int *native_binary_type)
{
typedef union
{
int int_value;
char byte_values[sizeof(int)];
} endian_test_type;
endian_test_type test;
test.int_value = 0;
test.int_value = 1;
if (test.byte_values[0] == 1)
*native_binary_type = PLY_BINARY_LE;
else if (test.byte_values[sizeof(int)-1] == 1)
*native_binary_type = PLY_BINARY_BE;
else
{
fprintf(stderr, "ply: Couldn't determine machine endianness.\n");
fprintf(stderr, "ply: Exiting...\n");
exit(1);
}
}
inline int get_native_binary_type2()
{
typedef union
{
int int_value;
char byte_values[sizeof(int)];
} endian_test_type;
endian_test_type test;
test.int_value = 0;
test.int_value = 1;
if (test.byte_values[0] == 1)
return PLY_BINARY_LE;
else if (test.byte_values[sizeof(int)-1] == 1)
return PLY_BINARY_BE;
else
{
fprintf(stderr, "ply: Couldn't determine machine endianness.\n");
fprintf(stderr, "ply: Exiting...\n");
exit(1);
}
}
/******************************************************************************
Verify that all the native types are the sizes we need
******************************************************************************/
inline int check_types()
{
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
if ((ply_type_size[PLY_CHAR] != sizeof(char)) ||
(ply_type_size[PLY_SHORT] != sizeof(short)) ||
(ply_type_size[PLY_INT] != sizeof(int)) ||
(ply_type_size[PLY_UCHAR] != sizeof(unsigned char)) ||
(ply_type_size[PLY_USHORT] != sizeof(unsigned short)) ||
(ply_type_size[PLY_UINT] != sizeof(unsigned int)) ||
(ply_type_size[PLY_FLOAT] != sizeof(float)) ||
(ply_type_size[PLY_DOUBLE] != sizeof(double)))
{
fprintf(stderr, "ply: Type sizes do not match built-in types\n");
fprintf(stderr, "ply: Exiting...\n");
exit(1);
}
return 1;
}
/******************************************************************************
Get a text line from a file and break it up into words.
IMPORTANT: The calling routine call "free" on the returned pointer once
finished with it.
Entry:
fp - file to read from
Exit:
nwords - number of words returned
orig_line - the original line of characters
returns a list of words from the line, or NULL if end-of-file
******************************************************************************/
inline char **get_words(FILE *fp, int *nwords, char **orig_line)
{
#define BIG_STRING 4096
char str[BIG_STRING];
char str_copy[BIG_STRING];
char **words;
int max_words = 10;
int num_words = 0;
char *ptr,*ptr2;
char *result;
fpos_t pos; //keep track of file pointer
int nbytes;
int nonUNIX;
nonUNIX=0;
nbytes=0;
fgetpos(fp, &pos);
words = (char **) myalloc (sizeof (char *) * max_words);
/* read in a line */
result = fgets (str, BIG_STRING, fp);
if (result == NULL) {
*nwords = 0;
*orig_line = NULL;
free(words);
return (NULL);
}
/* convert line-feed and tabs into spaces */
/* (this guarantees that there will be a space before the */
/* null character at the end of the string) */
str[BIG_STRING-2] = ' ';
str[BIG_STRING-1] = '\0';
for (ptr = str, ptr2 = str_copy; *ptr != '\0'; ptr++, ptr2++) {
*ptr2 = *ptr;
nbytes++;
if (*ptr == '\t') {
*ptr = ' ';
*ptr2 = ' ';
}
else if (*ptr == '\n') {
*ptr = ' '; //has to have a space, to be caught later when grouping words
*ptr2 = '\0';
break;
}
else if (*ptr == '\r')
{ //MAC line break
nonUNIX=1;
if(*(ptr+1)=='\n') //actuall PC line break
{
nbytes++;
}
*ptr = ' ';
*(ptr+1) = '\0'; //when reading mac, best end string here
*ptr2 = '\0'; //note a pc \r is followed by \n
break;
}
}
/*check to see if a PC or MAC header was detected instead of UNIX*/
if(nonUNIX==1)
{
fsetpos(fp, &pos);
fseek(fp, nbytes, SEEK_CUR);
}
/* find the words in the line */
ptr = str;
while (*ptr != '\0') {
/* jump over leading spaces */
while (*ptr == ' ')
ptr++;
/* break if we reach the end */
if (*ptr == '\0')
break;
/* save pointer to beginning of word */
if (num_words >= max_words) {
max_words += 10;
char **temp = (char **) realloc (words, sizeof (char *) * max_words);
if(temp){
words = temp;
}
else{
free(words);
return NULL;
}
}
words[num_words++] = ptr;
/* jump over non-spaces */
while (*ptr != ' ')
ptr++;
/* place a null character here to mark the end of the word */
*ptr++ = '\0';
}
/* return the list of words */
*nwords = num_words;
*orig_line = str_copy; // ToDo: This looks like UB, returns pointer to local variable on stack.
return (words);
}
/*
char **get_words(FILE *fp, int *nwords, char **orig_line)
{
#define BIG_STRING 4096
static char str[BIG_STRING];
static char str_copy[BIG_STRING];
char **words;
int max_words = 10;
int num_words = 0;
char *ptr,*ptr2;
char *result;
words = (char **) myalloc (sizeof (char *) * max_words);
// read in a line
result = fgets (str, BIG_STRING, fp);
if (result == NULL) {
*nwords = 0;
*orig_line = NULL;
return (NULL);
}
// convert line-feed and tabs into spaces
// (this guarantees that there will be a space before the
// null character at the end of the string)
str[BIG_STRING-2] = ' ';
str[BIG_STRING-1] = '\0';
for (ptr = str, ptr2 = str_copy; *ptr != '\0'; ptr++, ptr2++) {
*ptr2 = *ptr;
if (*ptr == '\t') {
*ptr = ' ';
*ptr2 = ' ';
}
else if (*ptr == '\n') {
*ptr = ' ';
*ptr2 = '\0';
break;
}
else if (*ptr == '\r') {
*ptr = '\0';
*ptr2 = '\0'; //note don't break yet, on a pc \r is followed by \n
}
}
// find the words in the line
ptr = str;
while (*ptr != '\0') {
// jump over leading spaces
while (*ptr == ' ')
ptr++;
// break if we reach the end
if (*ptr == '\0')
break;
// save pointer to beginning of word
if (num_words >= max_words) {
max_words += 10;
words = (char **) realloc (words, sizeof (char *) * max_words);
}
words[num_words++] = ptr;
// jump over non-spaces
while (*ptr != ' ')
ptr++;
// place a null character here to mark the end of the word
*ptr++ = '\0';
}
// return the list of words
*nwords = num_words;
*orig_line = str_copy;
return (words);
}*/
/******************************************************************************
Return the value of an item, given a pointer to it and its type.
Entry:
item - pointer to item
type - data type that "item" points to
Exit:
returns a double-precision float that contains the value of the item
******************************************************************************/
inline double get_item_value(char *item, int type)
{
unsigned char *puchar;
char *pchar;
short int *pshort;
unsigned short int *pushort;
int *pint;
unsigned int *puint;
float *pfloat;
double *pdouble;
int int_value;
unsigned int uint_value;
double double_value;
switch (type) {
case PLY_CHAR:
pchar = (char *) item;
int_value = *pchar;
return ((double) int_value);
case PLY_UCHAR:
puchar = (unsigned char *) item;
int_value = *puchar;
return ((double) int_value);
case PLY_SHORT:
pshort = (short int *) item;
int_value = *pshort;
return ((double) int_value);
case PLY_USHORT:
pushort = (unsigned short int *) item;
int_value = *pushort;
return ((double) int_value);
case PLY_INT:
pint = (int *) item;
int_value = *pint;
return ((double) int_value);
case PLY_UINT:
puint = (unsigned int *) item;
uint_value = *puint;
return ((double) uint_value);
case PLY_FLOAT:
pfloat = (float *) item;
double_value = *pfloat;
return (double_value);
case PLY_DOUBLE:
pdouble = (double *) item;
double_value = *pdouble;
return (double_value);
default:
fprintf (stderr, "get_item_value: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Write out an item to a file as raw binary bytes.
Entry:
fp - file to write to
int_val - integer version of item
uint_val - unsigned integer version of item
double_val - double-precision float version of item
type - data type to write out
******************************************************************************/
inline void write_binary_item(
FILE *fp,
int file_type,
int int_val,
unsigned int uint_val,
double double_val,
int type,
int *native_binary_type
)
{
unsigned char uchar_val;
char char_val;
unsigned short ushort_val;
short short_val;
float float_val;
void *value;
switch (type) {
case PLY_CHAR:
char_val = int_val;
value = &char_val;
break;
case PLY_SHORT:
short_val = int_val;
value = &short_val;
break;
case PLY_INT:
value = &int_val;
break;
case PLY_UCHAR:
uchar_val = uint_val;
value = &uchar_val;
break;
case PLY_USHORT:
ushort_val = uint_val;
value = &ushort_val;
break;
case PLY_UINT:
value = &uint_val;
break;
case PLY_FLOAT:
float_val = double_val;
value = &float_val;
break;
case PLY_DOUBLE:
value = &double_val;
break;
default:
fprintf (stderr, "write_binary_item: bad type = %d\n", type);
exit (-1);
}
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
if ((file_type != *native_binary_type) && (ply_type_size[type] > 1))
swap_bytes((char *)value, ply_type_size[type]);
if (fwrite (value, ply_type_size[type], 1, fp) != 1)
{
fprintf(stderr, "PLY ERROR: fwrite() failed -- aborting.\n");
exit(1);
}
}
/******************************************************************************
Write out an item to a file as ascii characters.
Entry:
fp - file to write to
int_val - integer version of item
uint_val - unsigned integer version of item
double_val - double-precision float version of item
type - data type to write out
******************************************************************************/
inline void write_ascii_item(
FILE *fp,
int int_val,
unsigned int uint_val,
double double_val,
int type
)
{
switch (type) {
case PLY_CHAR:
case PLY_SHORT:
case PLY_INT:
if (fprintf (fp, "%d ", int_val) <= 0)
{
fprintf(stderr, "PLY ERROR: fprintf() failed -- aborting.\n");
exit(1);
}
break;
case PLY_UCHAR:
case PLY_USHORT:
case PLY_UINT:
if (fprintf (fp, "%u ", uint_val) <= 0)
{
fprintf(stderr, "PLY ERROR: fprintf() failed -- aborting.\n");
exit(1);
}
break;
case PLY_FLOAT:
case PLY_DOUBLE:
if (fprintf (fp, "%g ", double_val) <= 0)
{
fprintf(stderr, "PLY ERROR: fprintf() failed -- aborting.\n");
exit(1);
}
break;
default:
fprintf (stderr, "write_ascii_item: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Write out an item to a file as ascii characters.
Entry:
fp - file to write to
item - pointer to item to write
type - data type that "item" points to
Exit:
returns a double-precision float that contains the value of the written item
******************************************************************************/
inline double old_write_ascii_item(FILE *fp, char *item, int type)
{
unsigned char *puchar;
char *pchar;
short int *pshort;
unsigned short int *pushort;
int *pint;
unsigned int *puint;
float *pfloat;
double *pdouble;
int int_value;
unsigned int uint_value;
double double_value;
switch (type) {
case PLY_CHAR:
pchar = (char *) item;
int_value = *pchar;
fprintf (fp, "%d ", int_value);
return ((double) int_value);
case PLY_UCHAR:
puchar = (unsigned char *) item;
int_value = *puchar;
fprintf (fp, "%d ", int_value);
return ((double) int_value);
case PLY_SHORT:
pshort = (short int *) item;
int_value = *pshort;
fprintf (fp, "%d ", int_value);
return ((double) int_value);
case PLY_USHORT:
pushort = (unsigned short int *) item;
int_value = *pushort;
fprintf (fp, "%d ", int_value);
return ((double) int_value);
case PLY_INT:
pint = (int *) item;
int_value = *pint;
fprintf (fp, "%d ", int_value);
return ((double) int_value);
case PLY_UINT:
puint = (unsigned int *) item;
uint_value = *puint;
fprintf (fp, "%u ", uint_value);
return ((double) uint_value);
case PLY_FLOAT:
pfloat = (float *) item;
double_value = *pfloat;
fprintf (fp, "%g ", double_value);
return (double_value);
case PLY_DOUBLE:
pdouble = (double *) item;
double_value = *pdouble;
fprintf (fp, "%g ", double_value);
return (double_value);
default:
fprintf (stderr, "old_write_ascii_item: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Get the value of an item that is in memory, and place the result
into an integer, an unsigned integer and a double.
Entry:
ptr - pointer to the item
type - data type supposedly in the item
Exit:
int_val - integer value
uint_val - unsigned integer value
double_val - double-precision floating point value
******************************************************************************/
inline void get_stored_item(
void *ptr,
int type,
int *int_val,
unsigned int *uint_val,
double *double_val
)
{
switch (type) {
case PLY_CHAR:
*int_val = *((char *) ptr);
*uint_val = *int_val;
*double_val = *int_val;
break;
case PLY_UCHAR:
*uint_val = *((unsigned char *) ptr);
*int_val = *uint_val;
*double_val = *uint_val;
break;
case PLY_SHORT:
*int_val = *((short int *) ptr);
*uint_val = *int_val;
*double_val = *int_val;
break;
case PLY_USHORT:
*uint_val = *((unsigned short int *) ptr);
*int_val = *uint_val;
*double_val = *uint_val;
break;
case PLY_INT:
*int_val = *((int *) ptr);
*uint_val = *int_val;
*double_val = *int_val;
break;
case PLY_UINT:
*uint_val = *((unsigned int *) ptr);
*int_val = *uint_val;
*double_val = *uint_val;
break;
case PLY_FLOAT:
*double_val = *((float *) ptr);
*int_val = (int) *double_val;
*uint_val = (unsigned int) *double_val;
break;
case PLY_DOUBLE:
*double_val = *((double *) ptr);
*int_val = (int) *double_val;
*uint_val = (unsigned int) *double_val;
break;
default:
fprintf (stderr, "get_stored_item: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Get the value of an item from a binary file, and place the result
into an integer, an unsigned integer and a double.
Entry:
fp - file to get item from
type - data type supposedly in the word
Exit:
int_val - integer value
uint_val - unsigned integer value
double_val - double-precision floating point value
******************************************************************************/
inline void get_binary_item(
FILE *fp,
int file_type,
int type,
int *int_val,
unsigned int *uint_val,
double *double_val,
int *native_binary_type
)
{
char c[8];
void *ptr;
ptr = (void *) c;
int ply_type_size[] = {
0, 1, 2, 4, 1, 2, 4, 4, 8
};
if (fread (ptr, ply_type_size[type], 1, fp) != 1)
{
fprintf(stderr, "PLY ERROR: fread() failed -- aborting.\n");
exit(1);
}
if ((file_type != *native_binary_type) && (ply_type_size[type] > 1))
swap_bytes((char *)ptr, ply_type_size[type]);
switch (type) {
case PLY_CHAR:
*int_val = *((char *) ptr);
*uint_val = *int_val;
*double_val = *int_val;
break;
case PLY_UCHAR:
*uint_val = *((unsigned char *) ptr);
*int_val = *uint_val;
*double_val = *uint_val;
break;
case PLY_SHORT:
*int_val = *((short int *) ptr);
*uint_val = *int_val;
*double_val = *int_val;
break;
case PLY_USHORT:
*uint_val = *((unsigned short int *) ptr);
*int_val = *uint_val;
*double_val = *uint_val;
break;
case PLY_INT:
*int_val = *((int *) ptr);
*uint_val = *int_val;
*double_val = *int_val;
break;
case PLY_UINT:
*uint_val = *((unsigned int *) ptr);
*int_val = *uint_val;
*double_val = *uint_val;
break;
case PLY_FLOAT:
*double_val = *((float *) ptr);
*int_val = (int) *double_val;
*uint_val = (unsigned int) *double_val;
break;
case PLY_DOUBLE:
*double_val = *((double *) ptr);
*int_val = (int) *double_val;
*uint_val = (unsigned int) *double_val;
break;
default:
fprintf (stderr, "get_binary_item: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Extract the value of an item from an ascii word, and place the result
into an integer, an unsigned integer and a double.
Entry:
word - word to extract value from
type - data type supposedly in the word
Exit:
int_val - integer value
uint_val - unsigned integer value
double_val - double-precision floating point value
******************************************************************************/
inline void get_ascii_item(
char *word,
int type,
int *int_val,
unsigned int *uint_val,
double *double_val
)
{
switch (type) {
case PLY_CHAR:
case PLY_UCHAR:
case PLY_SHORT:
case PLY_USHORT:
case PLY_INT:
*int_val = atoi (word);
*uint_val = (unsigned int) *int_val;
*double_val = (double) *int_val;
break;
case PLY_UINT:
*uint_val = strtol (word, (char **) NULL, 10);
*int_val = (int) *uint_val;
*double_val = (double) *uint_val;
break;
case PLY_FLOAT:
case PLY_DOUBLE:
*double_val = atof (word);
*int_val = (int) *double_val;
*uint_val = (unsigned int) *double_val;
break;
default:
fprintf (stderr, "get_ascii_item: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Store a value into a place being pointed to, guided by a data type.
Entry:
item - place to store value
type - data type
int_val - integer version of value
uint_val - unsigned integer version of value
double_val - double version of value
Exit:
item - pointer to stored value
******************************************************************************/
inline void store_item (
char *item,
int type,
int int_val,
unsigned int uint_val,
double double_val
)
{
unsigned char *puchar;
short int *pshort;
unsigned short int *pushort;
int *pint;
unsigned int *puint;
float *pfloat;
double *pdouble;
switch (type) {
case PLY_CHAR:
*item = int_val;
break;
case PLY_UCHAR:
puchar = (unsigned char *) item;
*puchar = uint_val;
break;
case PLY_SHORT:
pshort = (short *) item;
*pshort = int_val;
break;
case PLY_USHORT:
pushort = (unsigned short *) item;
*pushort = uint_val;
break;
case PLY_INT:
pint = (int *) item;
*pint = int_val;
break;
case PLY_UINT:
puint = (unsigned int *) item;
*puint = uint_val;
break;
case PLY_FLOAT:
pfloat = (float *) item;
*pfloat = double_val;
break;
case PLY_DOUBLE:
pdouble = (double *) item;
*pdouble = double_val;
break;
default:
fprintf (stderr, "store_item: bad type = %d\n", type);
exit (-1);
}
}
/******************************************************************************
Add an element to a PLY file descriptor.
Entry:
plyfile - PLY file descriptor
words - list of words describing the element
nwords - number of words in the list
******************************************************************************/
inline void add_element (PlyFile *plyfile, char **words)
{
PlyElement *elem;
/* create the new element */
elem = (PlyElement *) myalloc (sizeof (PlyElement));
elem->name = strdup (words[1]);
elem->num = atoi (words[2]);
elem->nprops = 0;
/* make room for new element in the object's list of elements */
if (plyfile->nelems == 0)
plyfile->elems = (PlyElement **) myalloc (sizeof (PlyElement *));
else
plyfile->elems = (PlyElement **) realloc (plyfile->elems,
sizeof (PlyElement *) * (plyfile->nelems + 1));
/* add the new element to the object's list */
plyfile->elems[plyfile->nelems] = elem;
plyfile->nelems++;
}
/******************************************************************************
Return the type of a property, given the name of the property.
Entry:
name - name of property type
Exit:
returns integer code for property, or 0 if not found
******************************************************************************/
inline int get_prop_type(char *type_name)
{
int i;
const char *type_names[] = {
"invalid",
"char", "short", "int",
"uchar", "ushort", "uint",
"float", "double",
};
const char *alt_type_names[] = {
"invalid",
"int8", "int16", "int32", "uint8", "uint16", "uint32", "float32", "float64",
};
for (i = PLY_START_TYPE + 1; i < PLY_END_TYPE; i++)
if (equal_strings (type_name, type_names[i]))
return (i);
for (i = PLY_START_TYPE + 1; i < PLY_END_TYPE; i++)
if (equal_strings (type_name, alt_type_names[i]))
return (i);
/* if we get here, we didn't find the type */
return (0);
}
/******************************************************************************
Add a property to a PLY file descriptor.
Entry:
plyfile - PLY file descriptor
words - list of words describing the property
nwords - number of words in the list
******************************************************************************/
inline void add_property (PlyFile *plyfile, char **words)
{
PlyProperty *prop;
PlyElement *elem;
/* create the new property */
prop = (PlyProperty *) myalloc (sizeof (PlyProperty));
if (equal_strings (words[1], "list")) { /* is a list */
prop->count_external = get_prop_type (words[2]);
prop->external_type = get_prop_type (words[3]);
prop->name = strdup (words[4]);
prop->is_list = 1;
}
else { /* not a list */
prop->external_type = get_prop_type (words[1]);
prop->name = strdup (words[2]);
prop->is_list = 0;
}
/* add this property to the list of properties of the current element */
elem = plyfile->elems[plyfile->nelems - 1];
if (elem->nprops == 0)
elem->props = (PlyProperty **) myalloc (sizeof (PlyProperty *));
else
elem->props = (PlyProperty **) realloc (elem->props,
sizeof (PlyProperty *) * (elem->nprops + 1));
elem->props[elem->nprops] = prop;
elem->nprops++;
}
/******************************************************************************
Add a comment to a PLY file descriptor.
Entry:
plyfile - PLY file descriptor
line - line containing comment
******************************************************************************/
inline void add_comment (PlyFile *plyfile, char *line)
{
int i;
/* skip over "comment" and leading spaces and tabs */
i = 7;
while (line[i] == ' ' || line[i] == '\t')
i++;
ply_put_comment (plyfile, &line[i]);
}
/******************************************************************************
Add a some object information to a PLY file descriptor.
Entry:
plyfile - PLY file descriptor
line - line containing text info
******************************************************************************/
inline void add_obj_info (PlyFile *plyfile, char *line)
{
int i;
/* skip over "obj_info" and leading spaces and tabs */
i = 8;
while (line[i] == ' ' || line[i] == '\t')
i++;
ply_put_obj_info (plyfile, &line[i]);
}
/******************************************************************************
Copy a property.
******************************************************************************/
inline void copy_property(PlyProperty *dest, PlyProperty *src)
{
dest->name = strdup (src->name);
dest->external_type = src->external_type;
dest->internal_type = src->internal_type;
dest->offset = src->offset;
dest->is_list = src->is_list;
dest->count_external = src->count_external;
dest->count_internal = src->count_internal;
dest->count_offset = src->count_offset;
}
/******************************************************************************
Allocate some memory.
Entry:
size - amount of memory requested (in bytes)
lnum - line number from which memory was requested
fname - file name from which memory was requested
******************************************************************************/
inline char *my_alloc(int size, int lnum, const char *fe)
{
char *ptr;
ptr = (char *) malloc (size);
if (ptr == 0) {
fprintf(stderr, "Memory allocation bombed on line %d in %s\n", lnum, fe);
}
return (ptr);
}
}
}
#endif
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